Alert archive / Washington / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 13, NWS Spokane, WA

June 21, 1998Chelan County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jun 21, 1998, 4:43 PM PDT for Chelan County, Washington. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 21, 1998, 4:43 PM PDT (23:43 UTC)
Expired
Jun 21, 1998, 5:45 PM PDT
In force
62 min
Issued by
NWS Spokane, WA
Area
Whole counties

County Chelan County, WA

The nearest sounding before it

Quillayute State, WA (KUIL), launched 12:00Z, 11.7 hours before the alert went out and 289 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Quillayute State, WA at 12:00Z on 1998-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Quillayute State, WA at 12:00Z on 1998-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1002 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

384 
WUUS1 KGEG 212343 RRA
SVRGEG
WAC007-220045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
443 PM PDT SUN JUN 21 1998

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL CHELAN COUNTY IN NORTH CENTRAL WASHINGTON
  INCLUDING STEVENS PASS

* UNTIL 545 PM PDT

* AT 439 PM PDT... SEVERE THUNDERSTORM INDICATED 29 MILES NORTHWEST
  OF LEAVENWORTH... BY NATIONAL WEATHER SERVICE DOPPLER RADAR...
  MOVING NORTH 5 MPH.

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

DRIFE

Nearby

Severe Thunderstorm Warnings in Washington, 1998Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.